Ontario Lake Depths
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Mirimoki Lake

Algoma District, Ontario · MNRF bathymetric survey
1m Mapped depth
3 ft
122 ha 1 contour
Paddling Index82Very GoodMedium confidencewooded shoreline · away from major roads · sheltered geometry
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Depth scale

The lake

Survey readout

Mirimoki Lake is mapped to a depth of 1 m (3 ft) on the Ontario MNRF survey and covers about 122 ha (302 acres) in Algoma District, Ontario. Depths come from the Ontario MNRF survey of 1966.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
1 m (3 ft)
Survey year
1966
Surface area
122 ha (302 acres)
Shoreline
19.2 km (11.9 mi) · irregular
Fishing access
No MNRF launch listed · check with Lake Superior Provincial Park
In
Lake Superior Provincial Park · Ontario Parks
Additional depth details1 contour
Contour depths
0–1 m (3 ft)
Deep-spot markers
1 m (3 ft)
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Chart data

Provenance

Sources: Ontario MNRF / LIO Bathymetry, Ontario FRI Leaf-On Imagery, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario, Copernicus DEM 30 m (© DLR/Airbus).

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Map details & sources5 sources

All layers registered to one bounding box; positions in WGS 84.

Survey-derived depth contours drape over Copernicus DEM (30 m) elevation, with a Ontario FRI aerial basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.

Coordinates
47.67478, -84.68790
MNRF lake ID
16-6739-52806
Basemap
Ontario FRI
Model size
0.6 MB

Check the source: this lake’s record (16-6739-52806) in the Ontario MNRF bathymetry index, and the contour line layer the map is drawn from (Land Information Ontario open data, Open Government Licence – Ontario). Survey year: 1966. This model was built 2026-09-26. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-28
82 / 100Very GoodData confidence: Medium

Mirimoki Lake has a heavily wooded and largely undeveloped setting, generally sheltered geometry, limited nearby major-road exposure.

Why this score?5 components

Included in the index

ComponentRatingPoints of weightMeasurement
Natural settingExcellent41.8 of 4397% natural land cover within 150 m of shore (88% forest, 8% wetland; 0% developed)
Geometric wind exposureVery Good24.9 of 36mean fetch 867 m · 16% of sampled water within 500 m of shelter · generally short fetch
Motor & speed rulesNot modelled—Canada publishes vessel motor and speed restrictions as federal legal schedules, not map data, so they are not part of the Ontario index. Check local signage and Transport Canada rules before going out.
Public accessNot listed—No publicly listed MNRF fishing access point within 100 m of this shoreline. Municipal, private and informal launches are not all in this source, so this is not evidence that access is poor — the component is excluded and the remaining weights are renormalized.
Road isolationVery Good15.3 of 21limited nearby major-road exposure · 5 Ontario Road Network segments within 1.2 km (traffic estimated from road class, not measured)

Additional paddling considerations

These describe the lake but are not part of the v1 Paddling Index and do not change the number above.

Wake sensitivity
Low — wide enough that wakes disperse over most of the lake
Observed motorized activity
Unknown — No lake-level measurement of boat traffic is available. Legal permission to operate motors is not evidence of use.
Wildlife habitat potential
High — 88% forest and 8% wetland cover within 150 m of shore
Mapped wildlife habitat
Mapped — Ontario MNRF has mapped moose aquatic feeding area within 1 km of this lake. These are habitat records from provincial surveys, not animal counts; areas with nothing mapped may still hold wildlife. · Ontario MNRF Wildlife Values Area. Contains information licensed under the Open Government Licence – Ontario.
How this index is calculated. The Paddling Index is a relative composite derived from lake geometry and public land-cover, access and road-network data. It is not a user review, a safety rating, or a prediction of an individual outing. Differences of a few points should not be treated as meaningful — an 84 and an 82 are broadly comparable. Components and weights for Ontario lakes: natural setting 35%, geometric wind exposure 29%, public access 18%, road isolation 18%. Motor and speed restrictions are not modelled for Ontario, and road traffic is estimated from road class, not measured. Where a component has no data the remaining weights are renormalized and the confidence rating is lowered; below Medium confidence no number is shown. Ontario scores are relative to other Ontario lakes and are not directly comparable with Paddling Index scores on our sister sites, which use different data sources and include a watercraft-rules component. Sources: Ontario MNRF bathymetry outline (0 m contour or survey index polygon), Ontario Land Cover v1.0, Ontario MNRF (Open Government Licence – Ontario) (2020) and Ontario Road Network (Open Government Licence – Ontario); traffic estimated by road class, not measured (2026-09). Conditions change quickly — check current weather and local conditions before going out.
Quick answers

Mirimoki Lake — common questions

How deep is Mirimoki Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Mirimoki Lake is 1 m (3 ft). That is the deepest depth the historical survey map records, which may differ from the deepest point of the lake itself.

How big is Mirimoki Lake?

Mirimoki Lake covers about 122 ha (302 acres) in Algoma District, Ontario.

Is there public access to Mirimoki Lake?

No fishing access point for Mirimoki Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline), but Mirimoki Lake lies inside Lake Superior Provincial Park (Ontario Parks), which runs its own facilities and is not covered by that data. Check with the park for launch details.